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besoin d’aide svp
99 Factoriser les expressions suivantes.
A=(x - 2)² – 36
B=1-(2x + 3)2
C=(3x - 2)2-(x + 3)2
D=(x + 5)2 - (2x - 4)2

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A = ( x - 2 - 6 ) ( x - 2 + 6 ) = ( x - 8 ) ( x + 4 )

B =  ( 1 + 2 x + 3 ) ( 1 - 2 x - 3 ) = ( 2 x + 4 ) ( - 2 x - 2 )

C =   ( 3 x - 2 + x + 3 ) ( 3 x - 2 - x - 3 ) = ( 4 x + 1 ) ( 2 x - 5 )

D = ( x + 5 + 2 x - 4 ) ( x + 5 - 2 x + 4 ) = ( 3 x + 1 ) ( - x + 9 )